Earth Fault

What does 3 mean?

The sum of the motor phase currents is not zero, indicating a current leakage to earth, detected by either hardware or software. This is typically caused by insulation malfunction in the motor or its cables, or a malfunction in associated filters (e.g., du/dt, sinus filters). An earth fault poses a safety risk and can cause equipment damage.

Complete Troubleshooting Guide

1. 1

   Perform an insulation resistance test on the motor and its cables.

2. 2

   Check any installed du/dt or sinus filters for proper operation and integrity.